Support stand assembly for a light source



FIG. 1 is a perspective view of a support stand assembly for a light source showing my new design;

FIG. 2 is a front elevational view thereof on an enlarged scale;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a support stand assembly for a light source, as shown and described. 